Is it wrong that I’ve come to expect German engineered technology to last? One of my older gamer systems still has a 2007 be quiet! power supply still running strong. I have a couple newer units here that served a couple demo systems flawlessly even coming back after a grounding issue. None of the components were damaged which points to a good unit. And, it didn’t take several hours of dissecting and overkill lab testing to know the unit was built right for the job.
As it stands, I find myself holding yet another be quiet! PSU that promises to keep my upgrades humming. It’s rated at 80Plus Bronze efficiency, and is ready to support your single or CrossFireX and SLI systems. Join me for a quickie, no-technical boredom, close look at the affordable be quiet! Pure Power L8 700 Watt power supply.
Features and Specifications
The be quiet! Pure Power (L8) series ranges from 300 to 700 Watts. It’s designed to provide a continuous and reliable 700 Watts at full load without dropping below its 80Plus Bronze efficiency rating (which tops out at about 88%). Like all power supplies in their arsenal, the 700 Watt model has voltage added in all the right areas in regards to the dual 12V rails. A total of 150W is provided from the 3.3 and 5V rails while 636W powers the 12V rails. (If you do the math, that’s a max of 785W which means the PSU has heart.)
- 3.3V rail – 25 Amps
- 5V rail – 20 Amps
- 12V1 rail – 35 Amps
- 12V2 rail – 30 Amps
- 5VSB rail – 15W and -12V rail 3.6W
The unit has OCP, OVP, UVP, SCP, OTP, and OPP protection to help ensure failure isn’t an option. The 120mm cooling fan is rated roughly 14dB at 20% to 31dB at 100% speed. This doesn’t mean the unit will get that loud as it really depends on temps and time span of output.
The be quiet! Pure Power 700W starts at around $90 US/CA if you find it on the shelves because it’s a popular level unit. If you need a modular unit, the similarly rated Pure Power CM units (marked by the x30 in the model number) are about $20 more. All of them are currently available exclusively at NCIX.
A Closer Look at the be quiet! Pure Power 700
At any rate, the unit is jet black sporting a matte finish. Only a white contrasting ring catches the eye around the ribbed 120mm fan. If you’re wondering, the fan is rated 13.8 dB(A) at lowest RPM and 30.8 at highest RPM. Typically, this means about 75 CFM (cubic feet per minute) of air is being pushed through the unit at full load. Let’s see just how loud the unit gets as well as how much power it provides.
Test System Setup
O-scopes come in very hand when measuring voltage and looking for ripple. Too much ripple or too little voltage and components can fail. But given our lab experience with be quiet! power supplies so far, we’ve come to expect their units to measure up, even if it isn’t their top of the line. We also have a test system that should push the unit to its maximum.
The system has an Intel Core i7-4770K Haswell Processor, GIGABYTE GA-Z87-OC Force motherboard, Kingston 8GB HyperX Beast memory, Dual NVIDIA GTX 770 video cards, and dual 1TB Western Digital Velociraptor hard drives. Yes, this puts the PSU on the hairy edge of full power but it should handle it none the less – right? Let’s find out!